I 



COUNCIL FOR 1847. 11 



considered unique, the cranium of the Ichthyosaurus exhibiting 

 neither displacement nor compression, while the lower jaw of the 

 Teleosaurus is detached, so as to allow of the superior surface 

 being seen through its whole extent, to the termination of the 

 condyloid processes." A very beautiful specimen of Asterias 

 arenicola (figured in pi. 17 of the London Geological Journal) 

 has also been obtained by purchase. The most remarkable 

 donations to the Geological collection have been the remains of 

 Gyrosteus mirabilis Agassiz, (a gigantic osseous fish) from the 

 Lias of Whitby, presented by Dr. Murray, of Scarborough, — a 

 unique Ichthyolite, (Pleuracanthus Iffivissimus Agassiz) pre- 

 sented by the widow of a late lamented member of the Society, 

 the Rev. T. Egerton, — a series of fossils from the Gloucester- 

 shire Lias, by Mr. AUis, — and some interesting remains of fishes 

 from the Caithness slate at Thurso, by Mr. David Graham. 



Mr. Charlesworth has made considerable progress in labelling 

 the general collection of fossils, and mounting the specimens on 

 tablets, a mode of arrangement which displays them to great 

 advantage. The fossils of the green sand, chalk, London clay, 

 and newer tertiary beds, are now exhibited after this method, 

 which he proposes gradually to extend to other parts of the col- 

 lection. 



The first part of the list of British fossils, referred to in the 

 report for 1845, embracing the whole of the known Tertiary 

 species, is now ready, and copies are laid on the table for the 

 inspection of members. 



The Council would also invite the attention of the Members 

 to the specimens of fossil zoophytes from the Flamborough 

 Chalk, which Mr. Charlesworth has happily succeeded in clearing 

 from the matrix by the application of dilute muriatic acid, so as 

 strikingly to exhibit not only the external aspect of these organic 

 remains in their original perfection and beauty, but also to shew 

 their internal structure. 



No donations of particular moment have been received for 

 the general collection of Ornithology; but a portion of the 

 Malacca collection, formerly purchased by the Society, has been 

 mounted at a considerable cost. The appropriation of one of the 



